Calvin E. Redfern

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Portland, OR, US

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Patents Grantslast 30 patents

Information Patent Grant
Offset pivot ground switch
- Patent number 4,006,325
- Issue date Feb 1, 1977
- Allis-Chalmers Corporation
- Calvin E. Redfern
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Ice breaking device for disconnect switch contact assemblies
- Patent number 4,001,530
- Issue date Jan 4, 1977
- Allis-Chalmers Corporation
- Calvin E. Redfern
- H01 - BASIC ELECTRIC ELEMENTS